Transcript
UNISONIC TECHNOLOGIES CO., LTD LR1108
CMOS IC
1A FAST ULTRA LOW DROPOUT LINEAR REGULATOR
DESCRIPTION
The UTC LR1108 operate from a +2.5V ~ +7.0V input supply as fast ultra low-dropout linear regulators. Wide output voltage range options are available. The fast response characteristic to make UTC LR1108 suitable for low voltage microprocessor application. The low quiescent current operation and low dropout quality caused by the CMOS process. The UTC LR1108 has ultra low dropout voltage 300mV at 1A load current typically. The ground pin current is typically 200uA at 1mA load current. ERROR Flag: When the output voltage drops 10% below nominal value Error flag goes low. Output Voltage Precision: Multiple output voltage options are available and ranging from 1.2V ~ 5.0V at room temperature with a guaranteed accuracy of ±1.5%, and ±3.0% when varying line, load and temperature.
FEATURES
* Ultra Low Dropout Voltage * Low Ground Pin Current * 0.04% Load Regulation * The Guaranteed Output Current is 1A DC * Output Voltage Accuracy ± 1.5% * ERROR Flag Indicates Output Status * Low Output Capacitor Required * Over temperature Protection And Over current Protection
ORDERING INFORMATION Ordering Number Lead Free Halogen Free LR1108L-xx-AA3--R LR1108G-xx-AA3--R LR1108L-xx-AB3--R LR1108G-xx-AB3--R LR1108L-xx-TN3--R LR1108G-xx-TN3--R LR1108L-xx-AF5-R LR1108G-xx-AF5-R
www.unisonic.com.tw Copyright © 2013 Unisonic Technologies Co., Ltd
Pin Assignment
Package SOT-223 SOT-89 TO-252 SOT-25
Packing
A: GOI C: GIO D: IGO I
G
SD
Tape Reel ERROR
O
1 of 7 QW-R102-031.M
LR1108
CMOS IC
MARKING INFORMATION
PACKAGE
VOLTAGE CODE
MARKING
SOT-223
4
5 SOT-25
SPXX
15 : 1.5V 18: 1.8V 25: 2.5V 2J: 2.85V 33: 3.3V 50: 5.0V
TO-252
1
2
G: Halogen Free L : Lead Free 3
SOT-89
PIN DESCRIPTION
For SOT-223/SOT-89/TO-252 Package PIN CODE & NO PIN NAME A C D 2 3 3 VOUT 1 1 2 GND 3 2 1 VIN For SOT-25 Package PIN NO PIN NAME 1 VIN 2 GND
I/O
3
SD
I
4
ERROR
O
5
VOUT
O
I/O O
DESCRIPTION Output Voltage Ground Input Supply
DESCRIPTION Input supply Ground Shutdown LR1108 enable; when the SD pin connects to GND will shutdown the LR1108; At normal operation, SD must be tied to VDD through a 10KΩ pull up resistor. Error flag, active low; when the output dropout of regulation due to low input voltage, the LR1108 produces a logic low signal at the ERROR pin. Output voltage
UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw
2 of 7 QW-R102-031.M
LR1108
CMOS IC
BLOCK DIAGRAM
UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw
3 of 7 QW-R102-031.M
LR1108
CMOS IC
ABSOLUTE MAXIMUM RATINGS
PARAMETER SYMBOL RATINGS UNIT 2.5~7.0 V Input Voltage (Operating) (Note 10) VIN Input Voltage (Survival) -0.3~+7.5 V Shutdown Input Voltage VIN(SHDN) -0.3~VIN+0.3 V Output Voltage (Survival), (Note 4, 5) VOUT -0.3~+7.5 V IOUT (Survival) Short Circuit Protected Maximum Voltage for ERROR Pin VIN+0.3 V Maximum Operating Current (DC) 1 A Power Dissipation (Note 2) PD Internally Limited Junction Temperature TJ +125 °C Operating Temperature TOPR -40~+125 °C Storage Temperature TSTG -65~+150 °C Note: Absolute maximum ratings are those values beyond which the device could be permanently damaged. Absolute maximum ratings are stress ratings only and functional device operation is not implied.
THERMAL DATA PARAMETER
Junction to Ambient
Junction to Case
SYMBOL SOT-223 SOT-25 TO-252 SOT-89 SOT-223 SOT-25 TO-252 SOT-89
θJA
θJC
RATINGS 165 249 112 179 15 165 12 47
UNIT °C/W
°C/W
ELECTRICAL CHARACTERISTICS
Limits in standard typeface are for TJ = 25°C, and limits in boldface type apply over the full operating temperature range. (TJ = 25°C, VIN = VO(NOM) + 1V, IL = 10mA, COUT = 2.2μF, VSD = VIN-0.3V, unless otherwise specified.) PARAMETER SYMBOL TEST CONDITIONS MIN TYP MAX UNIT +1.5 0mA ≤ IL ≤ 1A -1.5 % 0 Output Voltage Tolerance (Note 6) VOUT +3 VOUT +1 ≤ VIN≤ 7.0V -3 Output Voltage Line Regulation (Note 6) △VOUT VOUT+1V
